EP0480220A1 - Control armature inserted in the flow route of a system for transferring pressure media in a gaseous and/or liquid media - Google Patents

Control armature inserted in the flow route of a system for transferring pressure media in a gaseous and/or liquid media Download PDF

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Publication number
EP0480220A1
EP0480220A1 EP91116095A EP91116095A EP0480220A1 EP 0480220 A1 EP0480220 A1 EP 0480220A1 EP 91116095 A EP91116095 A EP 91116095A EP 91116095 A EP91116095 A EP 91116095A EP 0480220 A1 EP0480220 A1 EP 0480220A1
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EP
European Patent Office
Prior art keywords
pressure
housing
gaseous
connection
liquid
Prior art date
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Withdrawn
Application number
EP91116095A
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German (de)
French (fr)
Inventor
Bruno Armin Mock
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Individual
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Individual
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Publication of EP0480220A1 publication Critical patent/EP0480220A1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B45/00—Arrangements for charging or discharging refrigerant
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F17C13/025—Special adaptations of indicating, measuring, or monitoring equipment having the pressure as the parameter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
    • G01L19/14—Housings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0107—Single phase
    • F17C2223/0123—Single phase gaseous, e.g. CNG, GNC
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/01—Propulsion of the fluid
    • F17C2227/0128—Propulsion of the fluid with pumps or compressors
    • F17C2227/0135—Pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/043—Pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2345/00—Details for charging or discharging refrigerants; Service stations therefor
    • F25B2345/006—Details for charging or discharging refrigerants; Service stations therefor characterised by charging or discharging valves

Definitions

  • the present invention relates to a control fitting which can be used in the flow paths of a system for decanting gaseous and / or liquid-gaseous pressure media and which can be used on the low-pressure side as well as on the high-pressure side to connect to the circuit of a system to be filled, and can be connected to connecting stubs as well as further connection communicating with the former.
  • valve body of the valve body of which is divided into a low-pressure side for evacuating the system to be filled and a high-pressure side for gas filling.
  • Such control fittings are known as 2-way manifolds and 4-way manifolds. The latter have also become known in a significantly improved embodiment under the term Mano-Vac-Monteur plausible (CH patents 656 694 and 673 886 by the same applicant).
  • a guide channel inside the housing communicates at least on the low pressure side and high pressure side, each with a screw-on pressure gauge.
  • the object of the present invention is now to create a control valve of the aforementioned types, in which the leaks explained are avoided with certainty and cannot occur even when the control valve is subjected to long and heavy use.
  • the fitting housing on the front side through a viewing glass Gas and liquid-tight lockable chambers each have a manometer mechanism for receiving and fastening, the pressure-absorbing capillary tube of which is guided in a wall section of the housing in a gas-tight and liquid-tight manner and in the low-pressure side resp. high-pressure-side connecting medium duct section opens out.
  • the so-called 2-way control valve comprises a valve housing 20 which serves both on the low-pressure side 1 and on the high-pressure side 2 for connection to the circuit of a system to be filled, which is not shown here in detail. with valve 3 lockable connecting piece 4 resp. 4 'as well as further connection stubs 6 or respectively connected to the former by means of inner guide channels which can be shut off with valve 5. 6 'for the connection of a vacuum pump, not shown, among other things.
  • the flow process of the medium to the nozzle 7 on the housing 20 can be followed in a sight glass 14.
  • the control valve can be hung in place using hook 10.
  • valve housing 20 on the front side, has chambers 22 which can be closed gas-tight and liquid-tight by a sight glass 21 each for receiving and fastening a pressure gauge mechanism 23, the pressure-absorbing capillary tube 24 of which is guided gas-tight and liquid-tight in a wall section of the housing 20 and in relevant low-pressure side resp. high-pressure side connection means channel section 4 and 6 opens out.
  • the figure shows a control fitting with two pressure gauge chambers 22.
  • a housing with three pressure gauge chambers is to be provided.
  • the fitting housing is expediently a cast piece.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Measuring Fluid Pressure (AREA)
  • Valve Housings (AREA)

Abstract

The control armature is characterised in that the armature housing (20) has chambers (22), which can be closed on the front side in a gastight and fluidtight manner by in each case a viewing glass (21), for receiving and fastening in each case a manometer mechanism (23), the pressure-absorbing capillary tube (24) of which is guided in a gastight and fluidtight manner in a wall section of the housing (20) and opens in the respective low-pressure-side or high-pressure-side connection means duct section (4 or 6). <IMAGE>

Description

Die vorliegende Erfindung betrifft eine in die Strömungswege einer Anlage zum Umfüllen gasförmiger und/oder flüssiggasförmiger Druckmedien einsetzbare Kontrollarmatur, welche sowohl niederdruckseitig als auch hochdruckseitig zum Anschluss an den Kreislauf einer zu füllenden Anlage dienende, absperrbare Anschluss-Stutzen sowie weitere, mit ersteren kommunizierende Anschluss-Stutzen für den Anschluss einer Vakuum-Pumpe resp. an einen das Druckmedium enthaltenden Vorratsbehälter umfasst, und bei welcher Manometer mit den gehäuseinneren Kanalabschnitten der Anschluss-Mittel in Wirkungsverbindung stehen.The present invention relates to a control fitting which can be used in the flow paths of a system for decanting gaseous and / or liquid-gaseous pressure media and which can be used on the low-pressure side as well as on the high-pressure side to connect to the circuit of a system to be filled, and can be connected to connecting stubs as well as further connection communicating with the former. Connection for the connection of a vacuum pump resp. to a storage container containing the pressure medium, and in which pressure gauges are in operative connection with the inner channel sections of the connection means.

In vielen Bereichen der Technik, beispielsweise in der Kühltechnik ist es notwendig, Druckmedien in Behältnisse umzufüllen, wobei letztere vorgängig zu evakuieren sind. Beispielsweise verlangen Kühlschränke oder insbesondere auch Auto-Klimaanlagen zur erstmaligen Ingangsetzung oder nach Reparaturen des Systems ein Einfüllen eines Kühlmittels, in der Regel in Form eines Flüssiggases, in den Kreislauf der Anlage, wofür dieser Kreislauf zunächst evakuiert werden muss.In many areas of technology, for example in cooling technology, it is necessary to transfer pressure media into containers, the latter having to be evacuated beforehand. For example, refrigerators or in particular car air conditioning systems require a coolant, usually in the form of a liquid gas, to be filled into the system circuit for the first start-up or after the system has been repaired, for which purpose this circuit must first be evacuated.

Um diesen Vorgang auch in kleineren Werkstätten oder auch mobil durchführen zu können, ist es notwendig, dass sich der betreffende Monteur einer Kontrollarmatur bedienen kann, die eine genaue Beobachtung des nicht ungefährlichen Umfüllvorgangs zulässt.In order to be able to carry out this process also in smaller workshops or also on the move, it is necessary that the fitter in question can use a control valve which allows a precise observation of the non-harmless refilling process.

Entsprechend befindet sich eine Kontrollarmatur der vorgenannten Art auf dem Markt, deren Armaturgehäuse in eine Niederdruckseite zum Evakuieren des zu füllenden Systems und in eine Hochdruckseite zur Gaseinfüllung unterteilt ist.Accordingly, there is a control valve of the aforementioned type on the market, the valve body of which is divided into a low-pressure side for evacuating the system to be filled and a high-pressure side for gas filling.

Solche Kontrollarmaturen sind unter dem Begriff 2-Weg-Monteurhilfen und 4-Weg-Monteurhilfen bekannt. Letztere sind zudem in einer wesentlich verbesserten Ausführungsform unter dem Begriff Mano-Vac-Monteurhilfe bekannt geworden (CH-Patente 656 694 und 673 886 des gleichen Anmelders).Such control fittings are known as 2-way manifolds and 4-way manifolds. The latter have also become known in a significantly improved embodiment under the term Mano-Vac-Monteurhilfe (CH patents 656 694 and 673 886 by the same applicant).

Bei solchen Monteurhilfen kommuniziert mindestens niederdruckseitig und hochdruckseitig je ein gehäuseinnerer Führungskanal mit je einem aufschraubbaren Manometer.In the case of such manifolds, a guide channel inside the housing communicates at least on the low pressure side and high pressure side, each with a screw-on pressure gauge.

Gerade hier aber liegt das Problem, da schon geringste Undichtheiten im Bereich des Gewindezapfens höchst unerwünschte und unkontrollierbare Druckabfälle zur Folge haben können. Da weiter solche Kontrollarmaturen im Einsatz starken mechanischen Beanspruchungen unterliegen und die vom Armaturgehäuse über einen relativ dünnen Gewindezapfen frei abragenden Manometer oft angeschlagen werden, sind solche Undichtheiten schon nach kurzem Gebrauch zu erwarten, abgesehen von der Gefahr, die Manometer sonstwie zu beschädigen.But this is precisely where the problem lies, since even the slightest leak in the area of the threaded pin can result in highly undesirable and uncontrollable pressure drops. Since such control valves are subject to strong mechanical stresses in use and the pressure gauges that often protrude freely from the valve body via a relatively thin threaded pin, such leaks can be expected after only a short use, apart from the risk of otherwise damaging the pressure gauges.

Aufgabe der vorliegenden Erfindung ist nun die Schaffung einer Kontrollarmatur der vorgenannten Arten, bei welcher die erläuterten Undichtheiten mit Sicherheit vermieden werden und auch bei langer und heftiger Beanspruchung der Kontrollarmatur nicht auftreten können.The object of the present invention is now to create a control valve of the aforementioned types, in which the leaks explained are avoided with certainty and cannot occur even when the control valve is subjected to long and heavy use.

Dies wird nun erfindungsgemäss dadurch erreicht, dass das Armaturgehäuse, frontseitig durch jeweils ein Sichtglas gas- und flüssigkeitsdicht verschliessbare Kammern aufweist zur Aufnahme und Befestigung je eines Manometermechanismus, dessen druckaufnehmendes Kapillarrohr in einem Wandungsabschnitt des Gehäuses gas- und flüssigkeitsdicht geführt ist und im betreffenden niederdruckseitigen resp. hochdruckseitigen Anschlussmittel-Kanalabschnitt ausmündet.This is now achieved according to the invention in that the fitting housing, on the front side through a viewing glass Gas and liquid-tight lockable chambers each have a manometer mechanism for receiving and fastening, the pressure-absorbing capillary tube of which is guided in a wall section of the housing in a gas-tight and liquid-tight manner and in the low-pressure side resp. high-pressure-side connecting medium duct section opens out.

Durch diese Massnahmen ist es nunmehr möglich, das Kapillarrohr nicht nur absolut dicht einzukitten oder dgl., sondern auch gegen jeden Druck von aussen zu schützen. Es entsteht eine absolut kompakte Bauweise mit voll integrierten Manometern, die zudem keines eigenen Gehäuses mehr bedürfen. Hierbei ist jede Gehäuseform für die Kontrollarmatur denkbar und es können zwei und mehr Manometerkammern vorgesehen sein.With these measures, it is now possible not only to seal the capillary tube absolutely tightly or the like, but also to protect it against any external pressure. The result is an absolutely compact design with fully integrated pressure gauges, which also no longer require their own housing. Any form of housing for the control fitting is conceivable and two or more pressure gauge chambers can be provided.

Eine beispielsweise Ausführungsform des Erfindungsgegenstandes ist nachfolgend anhand der Zeichnung, welche in Frontansicht eine erfindungsgemässe 2-Weg-Kontrollarmatur zeigt, näher erläutert.An example embodiment of the subject matter of the invention is explained in more detail below with reference to the drawing, which shows a 2-way control fitting according to the invention in a front view.

Die sogenannte 2-Weg-Kontrollarmatur gemäss Figur umfasst ein Armaturgehäuse 20, das sowohl niederdruckseitig 1 als auch hochdruckseitig 2 zum Anschluss an den Kreislauf einer hier nicht näher gezeigten zu füllenden Anlage dienende, mit Ventil 3 absperrbare Anschluss-Stutzen 4 resp. 4' sowie weitere, mit ersteren durch gehäuseinnere Führungskanäle verbundene, mit Ventil 5 absperrbare Anschluss-Stutzen 6 resp. 6' für den Anschluss einer nicht näher gezeigten Vakuum-Pumpe u.a. aufweist. Hierbei lässt sich der Strömungsvorgang des Mediums zum Stutzen 7 am Gehäuse 20 in einem Schauglas 14 verfolgen. Mittels Haken 10 lässt sich die Kontrollarmatur an Ort aufhängen.The so-called 2-way control valve according to the figure comprises a valve housing 20 which serves both on the low-pressure side 1 and on the high-pressure side 2 for connection to the circuit of a system to be filled, which is not shown here in detail. with valve 3 lockable connecting piece 4 resp. 4 'as well as further connection stubs 6 or respectively connected to the former by means of inner guide channels which can be shut off with valve 5. 6 'for the connection of a vacuum pump, not shown, among other things. Here, the flow process of the medium to the nozzle 7 on the housing 20 can be followed in a sight glass 14. The control valve can be hung in place using hook 10.

Soweit ist eine solche Kontrollarmatur bekannt.So far, such a control valve is known.

Erfindungswesentlich ist hier, dass das Armaturgehäuse 20, frontseitig durch jeweils ein Sichtglas 21 gas- und flüssigkeitsdicht verschliessbare Kammern 22 aufweist zur Aufnahme und Befestigung je eines Manometermechanismus 23, dessen druckaufnehmendes Kapillarrohr 24 in einem Wandungsabschnitt des Gehäuses 20 gas- und flüssigkeitsdicht geführt ist und im betreffenden niederdruckseitigen resp. hochdruckseitigen Anschlussmittel-Kanalabschnitt 4 resp. 6 ausmündet.It is essential to the invention here that the valve housing 20, on the front side, has chambers 22 which can be closed gas-tight and liquid-tight by a sight glass 21 each for receiving and fastening a pressure gauge mechanism 23, the pressure-absorbing capillary tube 24 of which is guided gas-tight and liquid-tight in a wall section of the housing 20 and in relevant low-pressure side resp. high-pressure side connection means channel section 4 and 6 opens out.

Aus dem Vorbeschriebenen ergibt sich nunmehr eine Kontroll-Armatur von äusserst kompakter, sehr flacher Bauweise, welche sich optimal handhaben lässt.From the above, there is now a control fitting of extremely compact, very flat construction, which can be handled optimally.

Hierbei liegen verschiedene Modifikationen der vorbeschriebenen Konzeption durchaus im Rahmen des vorliegenden Erfindungsgedankens.There are various modifications to those described above Conception within the scope of the present inventive concept.

Die Figur zeigt hier eine Kontrollarmatur mit zwei Manometerkammern 22. Für die einleitend erwähnte Mano-Vac-Monteurhilfe ist ein solches Gehäuse mit drei Manometerkammern vorzusehen.The figure shows a control fitting with two pressure gauge chambers 22. For the Mano-Vac manifold aid mentioned in the introduction, such a housing with three pressure gauge chambers is to be provided.

Zweckmässig ist das Armaturgehäuse ein Guss-Stück.The fitting housing is expediently a cast piece.

Claims (3)

In die Strömungswege einer Anlage zum Umfüllen gasförmiger und/oder flüssiggasförmiger Druckmedien einsetzbare Kontrollarmatur, welche sowohl niederdruckseitig als auch hochdruckseitig zum Anschluss an den Kreislauf einer zu füllenden Anlage dienende, absperrbare Anschluss-Stutzen sowie weitere, mit ersteren kommunizierende Anschluss-Stutzen für den Anschluss einer Vakuum-Pumpe resp. an einen das Druckmedium enthaltenden Vorratsbehälter umfasst, und bei welcher Manometer mit den gehäuseinneren Kanalabschnitten der Anschluss-Mittel in Wirkungsverbindung stehen, dadurch gekennzeichnet, dass das Armaturgehäuse (20), frontseitig durch jeweils ein Sichtglas (21) gas- und flüssigkeitsdicht verschliessbare Kammern (22) aufweist zur Aufnahme und Befestigung je eines Manometermechanismus (23), dessen druckaufnehmendes Kapillarrohr (24) in einem Wandungsabschnitt des Gehäuses (20) gas- und flüssigkeitsdicht geführt ist und im betreffenden niederdruckseitigen resp. hochdruckseitigen Anschlussmittel-Kanalabschnitt (4 resp. 6) ausmündet.Control fittings which can be used in the flow paths of a system for decanting gaseous and / or liquid gaseous pressure media and which can be used on the low-pressure side and also on the high-pressure side for connection to the circuit of a system to be filled, lockable connection nozzles and further connection nozzles communicating with the former for connecting one Vacuum pump resp. to a storage container containing the pressure medium, and in which pressure gauges are in operative connection with the inner channel sections of the connection means, characterized in that the fitting housing (20), on the front side, through gas and liquid-tightly closable chambers (22 ) for receiving and fastening each a manometer mechanism (23), the pressure-absorbing capillary tube (24) in a wall section of the housing (20) is gas and liquid tight and in the low-pressure side resp. High-pressure-side connecting means channel section (4 or 6) opens out. Kontrollarmatur nach Anspruch 1, dadurch gekennzeichnet, dass das Armaturgehäuse mindestens zwei Manometerkammern (22) aufweist.Control valve according to claim 1, characterized in that the valve housing at least two pressure chambers (22). Kontrollarmatur nach Anspruch 1, dadurch gekennzeichnet, dass das Armaturgehäuse ein Guss-Stück ist.Control valve according to claim 1, characterized in that the valve housing is a cast piece.
EP91116095A 1990-10-08 1991-09-21 Control armature inserted in the flow route of a system for transferring pressure media in a gaseous and/or liquid media Withdrawn EP0480220A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH324090A CH681659A5 (en) 1990-10-08 1990-10-08
CH3240/90 1990-10-08

Publications (1)

Publication Number Publication Date
EP0480220A1 true EP0480220A1 (en) 1992-04-15

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ID=4251685

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EP91116095A Withdrawn EP0480220A1 (en) 1990-10-08 1991-09-21 Control armature inserted in the flow route of a system for transferring pressure media in a gaseous and/or liquid media

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EP (1) EP0480220A1 (en)
JP (1) JPH06294697A (en)
AU (1) AU646085B2 (en)
CA (1) CA2051946A1 (en)
CH (1) CH681659A5 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19800854C1 (en) * 1998-01-13 1999-06-02 Bkm Kaeltemechanik Bobbau Gmbh Method for accurately and safely assessing and controlling the main parameters of a refrigeration circuit

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH171762A (en) * 1933-09-11 1934-09-15 Franz Herkenrath A G Measuring instrument with single or multiple display devices, in particular for measuring pressure and temperature.
US4058016A (en) * 1976-04-01 1977-11-15 Rite Autotronics Corporation Combination vacuum/pressure gauge and dual purpose casing construction
CH673886A5 (en) * 1987-06-04 1990-04-12 Mock Bruno A

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4092865A (en) * 1976-06-24 1978-06-06 Gould Inc. Fluid-test apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH171762A (en) * 1933-09-11 1934-09-15 Franz Herkenrath A G Measuring instrument with single or multiple display devices, in particular for measuring pressure and temperature.
US4058016A (en) * 1976-04-01 1977-11-15 Rite Autotronics Corporation Combination vacuum/pressure gauge and dual purpose casing construction
CH673886A5 (en) * 1987-06-04 1990-04-12 Mock Bruno A

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19800854C1 (en) * 1998-01-13 1999-06-02 Bkm Kaeltemechanik Bobbau Gmbh Method for accurately and safely assessing and controlling the main parameters of a refrigeration circuit

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AU8460691A (en) 1992-04-09
CH681659A5 (en) 1993-04-30
CA2051946A1 (en) 1992-04-09
AU646085B2 (en) 1994-02-10
JPH06294697A (en) 1994-10-21

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